鲁科版四年级下册英语知识点总结

发布 2023-02-03 13:13:28 阅读 9738

四单元知识点。

1.频率副词:一般用来表示动作发生的次数、频率。

常见频度副词按频率大小排列如下:

always(100%)>usually(80%)>often(60%)>sometimes(40%)

共同点:放于主语后面,动词前面。

例: i usually do homework .

i often read books .

i sometimes watch tv.

sometimes位置灵活,句首、句中和句末都可以。

例:sometimes i go to the cinema .

i sometimes go to the cinema .

i go to the cinema sometimes .

2. 第三人称单数:

首先,要清楚第。

一、第二、第三人称各是什么。第一人称就是“我”和“我们”。第二人称是“你”和“你们”。第三人称单数是“他”、“她”和“它”,复数则是“他们”、“她们”和“它们”。

第三人称单数有:

人称代词he, she, it, 单个人名(danny, li ming, tom, my mum …)单数可数名词(the car )。

在一般现在时的句子中,当句子的主语为第三人称单数时,句子中的动词要相应地采用单数形式,即第三人称单数形式,也称“三单”或“单三”。

动词第三人称单数的变化规则:

1. 大部分的动词,构成第三人称单数时,直接加-s。

如:read-reads, play-plays, listen- listens, take-takes, climb-climbs, clean-cleans , write-writes , cook-cooks 。

2.当动词词尾是-s,x,ch,sh时,构成第三人称单数时,加-es。

如:watch-watches, wash-washes 。

3.动词词尾是-o的话,需要在词尾加-es构成第三人称单数。

如:do-does, go-goes。

4.特殊情况,h**e的第三人称单数为has。

句子练习:要点:1.句子的主语是第三人称而且还是单数。2.还经常和频率副词连用。

often reads books .

often writes emails .

yang often plays the piano .

often takes pictures at the weekend.

goes fast .

my dad cooks the meal .

ming often cleans the window at saturday.

3. 陈述句变一般疑问句变化规则:

句中有“is, are或can”的句子,把“is, are或can”提到句首。

例如:陈述句:he is from australia .变成一般疑问句:is he from australia ?

陈述句:jenny can wash clothes . 变成一般疑问句:can jenny wash clothes ?

陈述句:we are going to help grandpa li . 变成一般疑问句:are you going to help grandpa li?

句中没有“am, is, are或can”的句子,如果主语是第一人称、第二人称或第三人称复数的句子,句首加“do”, i,we”变成“you”,句号变问号,其余单词不变。

例如:陈述句:i can clean the floor . 变成一般疑问句:can you clean the floor ?

陈述句:i often climb the hill at the weekend . 变成一般疑问句:

do you often climb the hill at the weekend ?

陈述句:i live in beijing . 变成一般疑问句:do you live in beijing ?

句中没有“am, is, are”的句子,如果主语是第三人称单数时,句首加“does”, 动词三单形式还原成动词原形,句号变问号,其它单词不变。

提醒:在句首加does,第三人称已经通过does体现出人称的变化了,所以动词要用动词原形,不能再用动词的三单形式了。)

例如: 陈述句: peter often plays the violin at the weekend .

变成一般疑问句:does peter often play the violin at the weekend ?

陈述句:he often does housework .

变成一般疑问句:does he often do housework ?

注意:变为疑问句的第一个单词的第一个字母必须大写。

4.询问周末做什么的特殊疑问句:用特殊疑问词what引导。

句式基本结构:what+助动词(do或does)+主语+频率副词+do+其他?

询问第二人称的周末活动:

what do you often do at the weekend ? i often take pictures .

询问第三人称单数的周末活动:

what does your mother do at the weekend ? she often goes shopping.

what does peter do at the weekend ? he often listens to music .sometimes he plays the piano.

what does danny usually do ? he usually plays football .

难点单词和句子:

a nice weekend ! 周末愉快!

2.在周末:at the weekend

的书写没有空格,不能写成some times

h**e a picnic on saturday.让我们周六去野餐。let’s完整形式 let us

5.需要注意的几个动词短语三单形式:goes fishing ,goes shopping ,goes to the cinema , goes to the museum, does homework ,does housework ,washes clothes ,washes the dishes ,watches tv.

6.句子:sometimes i go to the park .和i sometimes go to the park .意思一样,都是我有时去公园。

易错读音:易错词组:

1. play +the +乐器:play the violin play the piano play the drums

+球类: play football play basketball play ping-pong

3.区分读音和意思:(watch tv wash clothes) (do housework do homework)

4.区分介词的使用:at the weekend on saturday on sunday

四单元动词:

go, do, help, h**e, visit, take, listen, read, play , watch, wash , write ,四单元主题作文:

my family’s weekends

we h**e nice weekends .my father often does housework at the weekend .sometimes he goes fishing .

my mother often washes clothes .sometimes she goes shopping. i often read books .

sometimes i go to the library .i like reading very much .i like my weekends .

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